To identify factors associated with maternal expressed emotion (EE) towards their child with intellectual disability (ID). A total of 33 mothers who had a child with ID and at least one child without disabilities between the ages of 4 and 14 years participated in the study. Mothers completed self-assessment questionnaires which addressed their sense of parenting competence, beliefs about child-rearing practices, and their reports of behavioural and emotional problems of their child with ID. Telephone interviews were conducted to assess maternal EE towards the child with ID and towards a sibling using the Five Minute Speech Sample (FMSS; Magana etal. 1986 ), and also to assess the adaptive behaviour of the child with ID using the Vineland Adaptive Behaviour Scale (VABS; Sparrow etal. 1984 ). Mothers with high EE towards their child with ID were more satisfied with their parenting ability, and their children had more behaviour problems. Analysis of differential maternal parenting, through comparisons of EE towards their two children, showed that mothers were more negative towards their child with ID for all domains of the FMSS except dissatisfaction. A small number of factors associated with maternal EE towards children with ID were identified. Differences in maternal EE towards their child with ID and their other child suggest that EE is child-driven rather than a general maternal characteristic. Implications of the data for future research are discussed.